Finding the Fourth Proportional to 1,855.65, 2,561.72 and 1,435.05

Step by Step Solution

1. Step 1: Write the proportion equation
   1,855.65 : 2,561.72 = 1,435.05 : x
2. Step 2: Convert to fraction form
   1,855.65/2,561.72 = 1,435.05/x
3. Step 3: Cross multiply
   1,855.65x = 2,561.72 × 1,435.05
4. Step 4: Simplify right side
   1,855.65x = 3,676,196.29
5. Step 5: Solve for x
   x = 3,676,196.29/1,855.65
6. Step 6: Final answer
   x = 1,981.08